EP1995529B1 - Load driving apparatus for outdoor unit of an air conditioner and load driving method - Google Patents

Load driving apparatus for outdoor unit of an air conditioner and load driving method Download PDF

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Publication number
EP1995529B1
EP1995529B1 EP07737670.5A EP07737670A EP1995529B1 EP 1995529 B1 EP1995529 B1 EP 1995529B1 EP 07737670 A EP07737670 A EP 07737670A EP 1995529 B1 EP1995529 B1 EP 1995529B1
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EP
European Patent Office
Prior art keywords
power
control circuit
motor
control
circuit
Prior art date
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Active
Application number
EP07737670.5A
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German (de)
English (en)
French (fr)
Other versions
EP1995529A1 (en
EP1995529A4 (en
Inventor
Morikuni c/o Kanaoka Factory NATSUME
Satoshi c/o Kanaoka Factory YAGI
Takuya c/o Kanaoka Factory KOTANI
Yasuaki c/o Kanaoka Factory MIYABA
Hirotaka c/o Kanaoka Factory SARUWATARI
Hiroyuki c/o Kanaoka Factory MATSUURA
Mario c/o Kanaoka Factory HAYASHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
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Daikin Industries Ltd
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Filing date
Publication date
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Publication of EP1995529A1 publication Critical patent/EP1995529A1/en
Publication of EP1995529A4 publication Critical patent/EP1995529A4/en
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Publication of EP1995529B1 publication Critical patent/EP1995529B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/60—Energy consumption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a technique for driving a load connected to a compressor of an outdoor unit of an air conditioner.
  • Patent Documents 1 to 7 as documents related to the present invention.
  • FIG. 6 is a circuit diagram showing a technique for driving a compressor.
  • Compressors 308 and 309 and a fan 310 are driven by motors 321, 322 and 323, respectively. Such driving is shown by a broken line in FIG. 6 .
  • Power source lines of an R phase, an S phase, and a T phase are connected to a three-phase power source 41, and power source switches 301 are interposed in the three power source lines.
  • the power source switch 301 has an input side connected to the three-phase power source 41 and an output side.
  • a motor 321 is connected to the output side of the power source switch 301 through a control switch 302. Meanwhile, a motor 322 is connected to the output side of the power source switch 301 through a compressor driver 31a.
  • the compressor driver 31a has inverter circuits including a diode bridge 312 and a switching circuit 314. In addition, it has a filter 313 provided between them. A DC voltage from the diode bridge 312 (or further from the filter 313) is supplied to the switching circuit 314. The switching circuit 314 switches the DC voltage and supplies it to the motor 322.
  • compressor driver 31a is commonly referred to as an inverter, it is described here as a driver to be distinguished from the above inverter circuit which is used in a more strict sense.
  • a fan driver 31b has a switching circuit 306 that switches the above DC voltage and supplies it to the motor 323.
  • the compressors 308 and 309 compress a cooling medium.
  • An air conditioner performing air conditioning with the cooling medium includes an indoor unit 5.
  • the fan 310 cools these compressors.
  • a power source line of a neutral point N is also connected to the three-phase power source 41 and connected to the compressor driver 31a together with the power source lines of R phase, S phase and T phase.
  • a noise filter 33 is provided between the output side of the power source switch 301 and the compressor driver 31a.
  • the power source lines of the R phase, the S phase and the T phase, and the power source lines of the R phase and the neutral point N are connected to the compressor driver 31a as a power source line group L1 and as a power source line group L2, respectively.
  • a power source input 311 is connected to the power source line group L2 and supplied with the operating power of the compressor driver 31a.
  • a power source line group L3 is indirectly connected to the power source line group L2 through the compressor driver 31a and supplies the operating power of the fan driver 31b to the fan driver 31b.
  • a control substrate 307 is connected to the power source lines of the R phase and the T phase on the output side of the power source switch 301 and also connected to the power source line of the neutral point N, and supplied with operating power from the three-phase power source 41.
  • the control substrate 307 generates switching control commands CNTL1 and CNTL2, which control switching of the switching circuits 314 and 306, respectively.
  • the switching control command CNTL2 is given to the fan driver 31b through the compressor driver 31a once together with the switching control command CNTL1, it can be regarded as being given from the compressor driver 31a to the fan driver 31b, and it can be regarded as being given from the control substrate 307 to the compressor driver 31a.
  • the switching control command CNTL2 may be given to the fan driver 31b directly without passing through the compressor driver 31a.
  • the compressors 308 and 309 When the compressors 308 and 309 detect an abnormality in pressure of its compressed cooling medium, they output abnormal pressure information SHP1 and SHP2 to the control substrate 307. Although the information may be signals, the information is recognized in the control substrate 307 as connection/disconnection of the switch in general.
  • the control substrate 307 generates an abnormal pressure signal HPS based on the abnormal pressure information SHP1 and SHP2 to output the same. More specifically, when at least one of the abnormal pressure information SHP1 and SHP2 indicates an abnormality in pressure, the outputted abnormal pressure signal HPS is asserted.
  • the abnormal pressure signal HPS controls the connection/disconnection of the control switches 302 and 303. This control is shown by a broken line in FIG. 6 . Since the abnormal pressure signal HPS is negated in general, the control switches 302 and 303 are connected.
  • FIG. 7 is a flowchart showing the operation to reduce standby power, in which the operations of the control substrate 307 are shown mainly.
  • blocks connected to blocks showing the steps, by broken lines are components that are controlled or power supplied/cut in that step.
  • step S11 the power source is turned on by turning on the power source switch 301 before the operation of the control substrate 307.
  • the operating power is supplied to the control substrate 307, the compressor driver 31a, and the motor 321.
  • the operating power is supplied to the fan driver 31b through the diode bridge 312 and the filter 313.
  • step S12 communication (shown by an outline arrow in FIG. 6 ) is performed between the control substrate 307 and the indoor unit 5, and it is determined whether the indoor unit 5 is in operation or not in step S12.
  • the determination in step S12 is repeated through a route R1.
  • the process proceeds to step S13 through a route R2, and the operations of the compressor driver 31a and the fan driver 31b are commanded.
  • the control commands CNTL1 and CNTL2 are given from the control substrate 307 to the compressor driver 31a and the fan driver 31b respectively to instruct operations of the compressor driver 31a and the fan driver 31b specifically.
  • step S14 it is determined whether the indoor unit 5 is stopped or not. This can be determined also by the control substrate 307 based on the communication between the control substrate 307 and the indoor unit 5.
  • the process proceeds to step S15, in which the operations of the compressor driver 31a and the fan driver 31b are stopped based on the control commands CNTL1 and CNTL2 from the control substrate 307.
  • step S15 the operations of the compressor 309 and the fan 310 are stopped when the indoor unit 5 is stopped, whereby standby power is reduced.
  • step S16 when it is determined that the power source is to be cut in step S16, the process proceeds to step S17 in which the power source is cut (the power source switch 301 is disconnected), and steps S12 to S15 are repeatedly carried out until it is determined that the power source is to be cut.
  • the power supplied to the compressor driver 31a and the fan driver 31b is not needed. Thus, since this power is consumed as the standby power, the power to the compressor driver 31a and the fan driver 31b is to be also cut while the indoor unit 5 is stopped.
  • step S16 is omitted in the technique shown in FIGS. 6 and 7 , so that the power supply to the compressor driver 31a and the fan driver 31b is just cut in step S17.
  • the present invention was made in view of the above trade-off, and it is an object of the present invention to save power of a second control circuit when the second control circuit drives a load under the control of a first control circuit.
  • a first aspect of the invention relates to the device for driving a load comprising first and second motors in an outdoor unit of an air conditioner, as defined in claim 1.
  • a second aspect of the invention relates to a method of controlling a device for driving a load comprising first and second motors in an outdoor unit of an air conditioner, as defined in claim 5.
  • the operating power to the second control circuit is supplied/cut based on the connection/disconnection of the first control switch, power saving can be implemented while the operating power is kept supplied to the first control circuit.
  • the cooling medium can be compressed by the second compressor to some extent.
  • the power supply to the inverter circuit is cut when the load becomes abnormal regardless of the power saving operation, and the abnormal situation is managed.
  • the power saving can be implemented while the operating power is kept supplied to the first control circuit.
  • the load driving device in the present invention when an abnormality in pressure occurs in the first compressor, the power supply to the inverter circuit is cut and the abnormal pressure of the cooling medium is managed.
  • FIG. 1 is a circuit diagram illustrating the constitution of an embodiment of the present invention. The same reference numerals are allotted to the same components in the constitutions shown in FIGS. 1 and 6 .
  • a control switch 305 that is connected to the output side of a power source switch 301 and performs connection/disconnection based on a switching command WP is provided and the switching command WP is outputted from a control substrate 307.
  • control switch 305 exists between a noise filter 33 and a power source input 311 in a compressor driver 31a to supply/cut power to the compressor driver 31a.
  • power source lines of a neutral point N and an S phase are used as a power source line group L2 connected to the power source input 311 in the compressor driver 31a, and that the connection/disconnection of the power source line of the S phase, which is one of the power source line group L2 is implemented by the control switch 305 in the constitution according to the present embodiment.
  • the power source lines of an R phase and the neutral point N may also be used in the present embodiment.
  • a control switch 304 is interposed in the S-phase power source line, and connecting/disconnecting thereof is controlled by the switching command WP.
  • the control switches 304 and 305 are interposed in the S-phase power source line between a three-phase power source 41 and the compressor driver 31a, and every connecting/disconnecting thereof is controlled by the switching command WP similarly. Therefore, they can be put together as one control switch on the side closer to the three-phase power source 41 than splitting into the power source line groups L1 and L2.
  • the power source input 311 supplies power to a microprocessor 316, and the microprocessor 316 generates a switching command T based on a switching control command CNTL1.
  • the microprocessor 316 outputs the switching command T to a switching circuit 314 to control the switching operation thereof and functions as an inverter control circuit for controlling an inverter circuit including the switching circuit 314.
  • a switching control command CNTL2 goes through the compressor driver 31a but it just passes through it substantially.
  • the microprocessor 316 is shown including a rectification circuit and a constant-voltage circuit required for its operation.
  • FIG. 2 is a flowchart showing the operation to reduce standby power in the present embodiment, in which step S11 in the flowchart shown in FIG. 7 is separated into steps Slla and Sllb, and step S12 is replaced with step S22A.
  • the power source switch 301 is conducted first in step S11a. At this time, the control switches 304 and 305 are not connected, and the power is not supplied to the compressor driver 31a and a fan driver 31b.
  • step S11a When step S11a is carried out, operating power is supplied to a control substrate 307 and the control substrate 307 communicates with an indoor unit 5 (as shown by an outline arrow in FIG. 1 ). Then, the process proceeds to step S11b in which the power is supplied to the compressor driver 31a and the fan driver 31b. More specifically, the control signal WP is asserted, and the control switches 304 and 305 are switched from the disconnection state to the connection state. Being the control switch 305 connected, the operating power of the compressor driver 31a is supplied from the power source line group L2 to the power source input 311. Accordingly, the operating power of the fan driver 31b is supplied from a power source line group L3.
  • a control switch 303 is connected in general, and together with the control switch 304, the R-phase, S-phase and T-phase powers are supplied from the power source line group L1 to the compressor driver 31a. Then, the process proceeds to step S22A.
  • Step S22A includes steps S220 to S225.
  • step S220 it is determined whether the indoor unit 5 is in operation or not as in step S12.
  • step S224 it is determined whether the operating power to the compressor driver 31a and accordingly the fan driver 31b is cut or not in step S224.
  • the operating power is supplied in step S225 (connection in the control switches 304 and 305 by asserting the control signal WP).
  • step S225 is not carried out, and the process proceeds from step S224 to step S13.
  • the operations in steps S13 to S16 have been already described.
  • step S11b After step S11b is carried out, under the condition where a predetermined condition is satisfied, the control signal WP is negated to disconnect the control switches 304 and 305, and the power driving a motor 322, the operating power of the compressor driver 31a itself, and the operating power of the fan driver 31b are cut (in S222).
  • the process proceeds to step S13 in which the compressor driver 31a and the fan driver 31b drive the motors 322 and 323 to drive a compressor 309 and a fan 310 based on the control commands CNTL1 and CNTL2.
  • the case where it is determined that the above predetermined condition is satisfied includes a case where the indoor unit 5 is not in operation (S220) and air conditioning is selected in a predetermined setting throughout a first time (ten minutes, for example) after the step S11b.
  • This predetermined setting is exemplified for the following cases (i) to (iii):
  • step S221 the air conditioning is not set in one of the above cases (i), (ii), and (iii), or even when it is set in one of them, in the case where the period thereof is shorter than the first time.
  • step S223 it is determined whether a second time (twenty minutes, for example) has elapsed after step S11b.
  • a second time for example
  • the process returns to step S220. Meanwhile, when the second time has elapsed, the process proceeds to step S222 in which the power for driving the motor 322, the operating power of the compressor driver 31a itself, and the operating power of the fan driver 31b are cut.
  • the second time is longer than the first time. This is because when the second time is equal to the first time or shorter, even when the air conditioning is set in one of the above cases (i), (ii), and (iii) in step S221, it is not determined whether the setting is continued for the first time or not.
  • step S222 when the power for driving the motor 322, the operating power of the compressor driver 31a itself, and the operating power of the fan driver 31b are cut in step S222, the process returns to step S220. Then, it is determined whether the indoor unit 5 is in operation or not again.
  • step S225 the process proceeds to step S225 through step S224, in which the power for driving the motor 322, the operating power of the compressor driver 31a itself, and the operating power of the fan driver 31b are supplied.
  • steps S221 to S223 for the power saving are carried out again.
  • the power for driving the motor 322 is supplied/cut by the connection/disconnection of the control switch 304, and the operating power of the compressor driver 31a itself and the operating power of the fan driver 31b are supplied/cut by the connection/disconnection of the control switch 305.
  • the power saving can be implemented.
  • the operating power can be supplied to the control substrate 307 again by asserting the switching command WP.
  • the operation control of the control switch 305 based on the switching command WP is shown by a broken line in FIG. 1 .
  • the control switch 304 is a preferable component in view of the power saving of the power for driving the motor 322, and the control switch 305 is a preferable component in view of the power saving of the operating power of the compressor driver 31a itself (and the operating power of the fan driver 31) required when the motor 322 is driven.
  • the power for driving the motor 322 is transformed by the inverter circuit in the compressor driver 31a. Therefore, one or both of the control switches 304 and 305 can be regarded as the preferable component in view of the power saving of the power supplied to the compressor driver 31a.
  • control switches 302 and 303 are provided, and they are disconnected when an abnormal pressure signal HPS is asserted. According to the above operation, when an abnormality in pressure occurs in the compressors 308 and 309, the power supply to the inverter circuit is cut, and the abnormal situation is managed regardless of the power saving.
  • the operation control of the control switches 302 and 303 by the abnormal pressure signal HPS is shown by a dotted line.
  • the control switch 302 When the abnormal pressure signal HPS is asserted, the control switch 302 is also disconnected, the power to the motor 321 is cut and the compressor 308 is stopped. When any one of an abnormal pressure signal SHP1 from the compressor 308 and an abnormal pressure signal SHP2 from the compressor 309 is asserted, then the abnormal pressure signal HPS is asserted. Therefore, even when an abnormality occurs in the compressor 308, not only the control switch 302 but also the control switch 303 are disconnected to stop the compressor 309. As a matter of course, the compressor 308 is not necessarily provided in the present invention.
  • the present invention can be applied not only to the case where the three-phase power source 41 has the neutral point N, but also to the case where the three-phase power source has no neutral point, keeping the constitution of the compressor driver 31a.
  • the compressor 308 driven by the motor 321 is provided, even when the control switch 305 is disconnected and the compressor 309 is stopped to carry out the power saving, the cooling medium can be compressed by the compressor 308 to some extent.
  • an outdoor unit having the compressors 308 and 309, the motors 321 and 322 for driving those, the control substrate 307 and the compressor driver 31a is preferable from the perspective that it can be in operation while saving the power.
  • the fan driver 31b, the motor 323, and the fan 310 are preferably provided.
  • step S222 all the power supplies to the compressor driver 31a may not cut but at least part of them may be cut. More specifically, for instance, the operating power of the compressor driver 31a itself may be cut by the switch 305 alone without cutting the power for driving the motor 322.
  • FIG. 3 is a circuit diagram illustrating the constitution of such variation.
  • the control switch 304 is shorted from the constitution shown in FIG. 1 , and a wiring group L1 is not cut by a switching command WP.
  • the switching command WP only controls the switching of a control switch 305.
  • a wiring group L3 is drawn from a side further from the power source input 311 than the control switch 305, and the supply/cut of the power to the wiring group L3 is depend on the switching of the control switch 305.
  • the wiring group L3 may be drawn from a part closer to the power source input 311 than the controls witch 305, and the supply/cut of the power to the wiring group L3 may not depend on the switching of the control switch 305.
  • a compressor driver 31a and a fan driver 31b may be mounted on the same substrate as a control substrate 307.
  • the operation along the flowchart shown in FIG. 2 may be performed for the constitution shown in FIG. 3 .
  • the operation along the following flowchart may be performed therefor.
  • FIG. 4 is a flowchart showing the operations to reduce power in the constitution shown in FIG. 3 , in which step S22A in the flowchart shown in FIG. 2 is replaced with step S22B.
  • step S220 of step S22A is replaced with step S226, and step S223 is removed. More specifically, unless it is determined that ten minutes have elapsed under a predetermined setting in step S221, the process returns to step S226.
  • step S226 similar to step S221, it is determined whether the predetermined setting is made or not.
  • the predetermined setting in these steps employs the setting that an inverter circuit is not controlled. Thus, it is determined whether a time during which the inverter circuit is not controlled has continued more than ten minutes or not in steps S221 and S226. When the determination is affirmative, the process proceeds to step S222 and when the determination is negative, the process proceeds to step S224.
  • step S222 shown in FIG. 4 Since the control switch 304 is not provided in FIG. 3 , the power supply to a switching circuit 306 of a fan driver 31b is not cut in step S222 shown in FIG. 4 . Thus, the power supply cut of the fan driver 31b is not shown in step S222 shown in FIG. 4 unlike step S222 shown in FIG. 3 . Although the power supply to the wiring group L3 is cut, the power source to the wiring group L3 may not be cut as described above.
  • the setting that the inverter circuit is not controlled includes the following cases:
  • step S226 When the setting is contrary to any one of the above cases (iv) to (vi), the process proceeds from step S226 to step S224.
  • FIG. 5 is a circuit diagram illustrating the case where the constitution shown in FIG. 3 includes a single-phase power source.
  • the three-phase power source 41 is replaced with a single-phase power source 41, the power source switch 301, the control switch 302, and the motor 321 are replaced with those for the single phase.
  • a wiring group L2 does not contain three lines but two lines.
  • the indoor unit 5 may communicate with the microprocessor 316 through the control substrate 307. In this case, for example, it is determined whether the communication is correct or not appropriately. However, it is to be noted that this determination is not made when the control switch 305 is disconnected in step S222 shown in FIGS. 2 and 4 . This is because the microprocessor 316 is not in operation in that case. Thus, that determination is made after step S225, and it is preferable that the above communication is reattempted from the initial operation, for example, the operation when the power source is turned on.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)
EP07737670.5A 2006-03-08 2007-03-02 Load driving apparatus for outdoor unit of an air conditioner and load driving method Active EP1995529B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006062134 2006-03-08
JP2006233758A JP4075951B2 (ja) 2006-03-08 2006-08-30 負荷駆動装置及び空気調和機の室外機並びに負荷の駆動方法
PCT/JP2007/054022 WO2007102423A1 (ja) 2006-03-08 2007-03-02 負荷駆動装置及び空気調和機の室外機並びに負荷の駆動方法

Publications (3)

Publication Number Publication Date
EP1995529A1 EP1995529A1 (en) 2008-11-26
EP1995529A4 EP1995529A4 (en) 2015-01-21
EP1995529B1 true EP1995529B1 (en) 2018-12-19

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EP07737670.5A Active EP1995529B1 (en) 2006-03-08 2007-03-02 Load driving apparatus for outdoor unit of an air conditioner and load driving method

Country Status (8)

Country Link
US (1) US8109103B2 (ko)
EP (1) EP1995529B1 (ko)
JP (1) JP4075951B2 (ko)
KR (1) KR101027613B1 (ko)
CN (1) CN101395430B (ko)
AU (1) AU2007223535B2 (ko)
ES (1) ES2715601T3 (ko)
WO (1) WO2007102423A1 (ko)

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JP4075951B2 (ja) 2008-04-16
CN101395430A (zh) 2009-03-25
EP1995529A1 (en) 2008-11-26
AU2007223535A1 (en) 2007-09-13
WO2007102423A1 (ja) 2007-09-13
US8109103B2 (en) 2012-02-07
US20090007579A1 (en) 2009-01-08
AU2007223535B2 (en) 2010-08-19
KR101027613B1 (ko) 2011-04-06
EP1995529A4 (en) 2015-01-21
JP2007271248A (ja) 2007-10-18
CN101395430B (zh) 2010-08-11
KR20080100234A (ko) 2008-11-14
ES2715601T3 (es) 2019-06-05

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